# Fulmen FB621 · Car battery 12V 62Ah 540A

![Fulmen FB621 · Car battery 12V 62Ah 540A](https://bateriasonline.es/2957-home_default/fulmen-fb621.jpg)

> Fulmen FB621: 62 Ah car battery, 540 A (EN), 242×175×190 mm, positive terminal on the left, L2 case. Equivalent to Exide EB621 and Tudor TB621.

**Category:** [Car batteries](https://bateriasonline.es/en/car-batteries) → [Fulmen](https://bateriasonline.es/en/fulmen-batteries)

- **Canonical URL**: https://bateriasonline.es/en/fulmen-fb621
- **Language**: en
- **Brand**: Fulmen
- **Reference**: BOL-FULMEN-FB621
- **EAN**: 3661024044547
- **MPN**: FB621
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulmen |
| Range | FULMEN Formula |
| Application | Cars |
| Technology | Lead-acid |
| Voltage | 12 V |
| Capacity | 62 Ah |
| Cold cranking amps (EN) | 540 A |
| Length | 242 mm |
| Width | 175 mm |
| Height | 190 mm |
| Weight | 14.4 kg |
| Polarity | Positive terminal on the left |
| Case size | L2 (242 × 175 × 190 mm) |

## Quick description

Fulmen FB621: car battery with 12 V, 62 Ah and 540 A cold cranking current, case size L2 (242 × 175 × 190 mm), with the positive terminal on the left. If yours has the positive terminal on the right, you need the Fulmen FB620.

## Description

## Who the Fulmen FB621 is for

The Fulmen FB621 is made for petrol and diesel cars without automatic engine stop. If your car has no Start-Stop and had a 62 Ah battery, the FB621 is a direct replacement.
At 62 Ah it is the usual size for compact diesels and mid-size petrol saloons. The FB621 belongs to the Fulmen FULMEN Formula range. [See all Fulmen batteries](https://bateriasonline.es/en/fulmen-batteries)

## Part numbers and codes for the Fulmen FB621

Shops, garages and catalogues identify the FB621 with these codes:

| Commercial reference | FB621 |
|---|---|
| EAN | 3661024044547 |
| Case size (EN) | L2 |
| Not to be confused with | Fulmen FB620 (62 Ah, 540 A, positive terminal on the right) |

## Fulmen FB621 vs FB501, FB620 and FB741: which one to choose?

The real differences between the FB621 and the closest Fulmen models:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulmen FB621 (this one) | 62 Ah | 540 A | 242 × 175 × 190 | left | 14.4 kg |
| Fulmen FB501 | 50 Ah | 450 A | 207 × 175 × 190 | left | 12.2 kg |
| Fulmen FB620 | 62 Ah | 540 A | 242 × 175 × 190 | right | 13.9 kg |
| Fulmen FB741 | 74 Ah | 680 A | 278 × 175 × 190 | left | 16.6 kg |

- Fulmen FB501: 12 Ah less, 90 A less cranking power, a different case (207 × 175 × 190 mm).
- Fulmen FB620: identical to the FB621 except for the positive terminal, which is on the other side (positive terminal on the right).
- Fulmen FB741: 12 Ah more, 140 A more cranking power, a different case (278 × 175 × 190 mm).

## Equivalents and alternatives to the Fulmen FB621

Batteries that fit the FB621's tray with the same polarity; besides other conventional batteries, an EFB or AGM of this size is a valid upgrade for the FB621.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Exide EB621 | Lead-acid | 62 Ah | 540 A | 242 × 175 × 190 |
| Tudor TB621 | Lead-acid | 62 Ah | 540 A | 242 × 175 × 190 |
| Deta DB621 | Lead-acid | 62 Ah | 540 A | 242 × 175 × 190 |
| Varta D43 | Lead-acid | 60 Ah | 540 A | 242 × 175 × 190 |
| Kronobat PB-60.1 | Lead-acid | 60 Ah | 540 A | 242 × 175 × 190 |
| Varta D39 | Lead-acid | 63 Ah | 610 A | 242 × 175 × 190 |

## What it means that the FB621 is lead-acid

Inside, the FB621 is classic lead-acid: liquid electrolyte and lead plates. It is a robust, well-known technology with a good capacity-to-price ratio, and still the basis of most cars, trucks and traction equipment.

## Check this before ordering the Fulmen FB621

- If your car has Start-Stop, the FB621 is not the right one: it needs an EFB or an AGM.
- The FB621 delivers 540 A cold cranking (EN standard); do not go below what your original battery states.
- Capacity of the FB621: 62 Ah; the same as your current battery or slightly more is fine.
- With the terminals facing you, the positive terminal of the FB621 is on the left.
- The FB621 needs 242 × 175 × 190 mm of space (European case size L2): measure it with the hold-down clamp in place.

## Frequently asked questions about the Fulmen FB621

### FB621 or FB501: which one suits me?

Compared with the FB621, the Fulmen FB501 has 12 Ah less and 90 A less cranking power. The FB621 cranks harder; the FB501 is only a good option if your original battery says 450 A or less. Mind the space: the FB501 measures 207 × 175 × 190 mm.

### Fulmen FB621 or FB620: what is the difference?

Only the polarity: the FB621 has the positive terminal on the left and the FB620 the positive terminal on the right. Capacity (62 Ah), cranking power and dimensions are identical.

### Can the Fulmen FB621 be used in a car with Start-Stop?

No. The FB621 is a lead-acid battery for cars without automatic engine stop; Start-Stop needs an EFB or an AGM.

### How much does the Fulmen FB621 weigh?

14.4 kg, with 62 Ah of capacity. For reference, the Fulmen FB501 (50 Ah) weighs 12.2 kg.

### Which battery is equivalent to the Fulmen FB621?

With the same dimensions, polarity and similar capacity you have the Exide EB621, Tudor TB621 and Deta DB621. As the FB621 is a conventional battery, an EFB or AGM of the same size also works.

### What case size is the Fulmen FB621?

Case size L2: 242 × 175 × 190 mm. The FB621 fits any standard L2 battery tray such as the Exide EB621.

## Other options if you are unsure about the FB621

- [All car batteries](https://bateriasonline.es/en/car-batteries)
- [The whole Fulmen range](https://bateriasonline.es/en/fulmen-batteries)
- [Exide EB621](https://bateriasonline.es/en/exide-eb621) · 62 Ah, 540 A, 242×175×190 mm
- [Tudor TB621](https://bateriasonline.es/en/tudor-tb621) · 62 Ah, 540 A, 242×175×190 mm

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*bateriasonline.es — Batteries and accessories · 2026-11-10*